Natyashastra
व्यंसितं वामहस्तं च सह पादेन सर्पयेत् । निकुट्टकद्वयं कार्यमाक्षिप्तं मण्डलोरसि ॥ १९१॥
The left hand should be bent and moved along with the foot, creating a serpentine motion. The two Nikuttakas should be performed, along with the Ākṣipta in the chest.
english translation
vyaMsitaM vAmahastaM ca saha pAdena sarpayet । nikuTTakadvayaM kAryamAkSiptaM maNDalorasi ॥ 191॥
hk transliteration by Sanscript